Golf swing plane correction device

ABSTRACT

A golf swing plane correction device is set up rearwardly of a ball impact direction to correspond to a ball position and includes a bottom board. The bottom board are rotatably coupled, at the top side thereof, with two backswing and downswing plane angle adjustment bars through a resistance-adjustable shaft seat. The angle adjustment bars each have an operation end that is jointed to a bar extending therefrom to form optimum backswing and downswing plane angle. The backswing plane angle adjustment bar is provided with two movable reference rings, one of which is at a location corresponding to the deltoid muscle of a player and the other is adjusted to a location corresponding to the hand at the top of backswing. The downswing plane angle adjustment bar is provided with a movable reference ring, which is set at an end of a club grip of the player.

(a) TECHNICAL FIELD OF THE INVENTION

The present invention relates generally to a structure design for a teaching assisting device for training of golf swing, and more particularly to a golf swing plane correction device that converts an abstract swing plane into a tangible form for exhibition for accurate and timely adjustment and modification and improvement of swing posture.

(b) DESCRIPTION OF THE PRIOR ART

Golf is an interesting sport that is beneficial both mentally and physically and is fit to young and elder people, but is also a skill-relied and challenging sport. To play a good game, instruction by a professional trainer and long time practice are necessary. Every person who do golfing is aware that a correct swing motion and proper use of core muscle groups would make the shot long and accurate and also help prevent sports injury caused by improper posture. Thus, correct swing motions and use of core muscle groups are vital factors for plying golf.

However, the entire swing motion, from a standing posture before backswing to takeaway to a top point of swing (the upper body driving the lower body), and converting from the top point to a downswing to impact, follow-through, and final finish (the lower body driving the upper body), all require correctness of the entire body, upper and lower parts, including the head position, spine angle, natural angles of wrists, and standing posture and posture angle, through mutual collaboration through turning of two arms, torso, and hips to the motions of shifting of gravity center of two feet, to make a club to generate an ideal backswing and downswing plane and to completely release the force of the club head to make a shot of accurate shot direction and range. This can only be learnt through repeated and continuous practicing and correction. A beginner, in practicing swing training, often retain a trainer to assist in teaching and correcting swing motion and posture so as to ensure the club head is kept on a trace on a correct backswing and downswing plane. However, such a backswing and downswing plane is an abstract concept and can only be inspected by the experience of the trainer. Consequently, it is often not possible to effectively and correctly identify the deficiency of a trainee. The learning performance of the trainee would also be poor for not perceiving the concept of swing plane, or even leading to incorrect posture, making it harder to correct the posture in a later time.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a golf swing plane correction device, which involve a structure design that allows for exhibition of point-line-surface three-dimensional space to convert an abstract swing plane into a tangible form to make it possible to identify deficiency of swing and to make timely correction and improvement to thereby improve learning performance and enhance skill.

To achieve the above objective, the present invention comprises a bottom board, a shaft seat, and the two angle adjustment bars. The shaft seat provides adjustable resistance and is mounted to a top side of the bottom board. Two backswing and downswing plane angle adjustment bars are respectively and rotatably coupled to the shaft seat and are acted upon by the resistance of the shaft seat to allow them to be adjusted to any desired angles and positioned there. The angle adjustment bars each have an operation end jointed to a bar extending therefrom. The backswing plane angle adjustment bar is provided with two movable reference rings, wherein one of the reference rings is at a location corresponding to the deltoid muscle of the player and the other one of the reference rings is adjusted to a location corresponding to the hands at a top of the backswing. The downswing plane angle adjustment bar is provided with a movable reference ring, and the reference ring is at a location corresponding to an end of a club grip of the player.

To use, the correction device is set up at a rear side of ball impact direction so that an axis of the shaft seat is at a location corresponding to a ball position. According to the height of the player and a desired length of a club used, the angle adjustment bars are each adjusted to an optimum location such that the bars extending therefrom respectively form reference axes for correcting a swing plane for backswing and downswing of striking a golf ball. The two reference rings of the backswing plane angle adjustment bar are respectively set at locations corresponding to the deltoid muscle of the player and the hands at the top of backswing. The a reference ring of another downswing plane angle adjustment bar is set at a location corresponding to the end of the club grip of the player in order to observe and correct the correctness of swing posture. As such, with such a design of the correction device, through exhibition in a point-line-surface three-dimensional space, the abstract swing plane is converted into a tangible form to allow for effectively identifying the deficiency of swing for timely correction to thereby improve learning performance and enhance skills.

The golf swing plane correction device may be further provided with a vertical pillar that is provided, at one side where the two backswing and downswing angle adjustment bars extend, in a manner of perpendicular to the ground. The vertical pillar is coupled with a plurality of correctors for adjustment of height positions to allow for connection with the angle adjustment bars.

The golf swing plane correction device may be further provided with a conversion plane bar that is coupled, through a corrector, to the vertical pillar between the two bars. The reference rings are rotatably coupled to two ends of the conversion plane bar.

The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the present invention.

FIG. 2 is an exploded view showing a structure of the present invention.

FIG. 3 is a schematic view showing resistance adjustment of a shaft seat according to the present invention.

FIG. 3A is a schematic view illustrating an operation of an angle adjustment bar according to the present invention.

FIG. 4 is a top plan view illustrating a use of the present invention.

FIG. 5 is a side elevational view of the use of the present invention, illustrating, in a schematic form, a condition of address.

FIG. 6 is a schematic view illustrating correction of takeaway motion according to the present invention.

FIG. 7 is a schematic view illustrating observation and correction of a club head position in backswing according to the present invention.

FIG. 8 is a schematic view illustrating observation and correction of a club head movement in backswing according to the present invention.

FIG. 9 is a schematic view illustrating correction of positions of two hands in top of swing according to the present invention.

FIG. 10 is a schematic view illustrating observation and correction of a movement of the two hands in downswing according to the present invention.

FIG. 11 is a schematic view illustrating observation and correction of conversion of a downswing club head to a downswing plane according to the present invention.

FIG. 12 is a schematic view illustrating observation and correction of a movement of the club head in downswing according to the present invention.

FIG. 13 is a schematic view illustrating observation and correction of a movement of the club head in impact according to the present invention.

FIG. 14 is a schematic view illustrating impact according to the present invention.

FIG. 15 is a schematic view illustrating follow-through according to the present invention.

FIG. 16 is another schematic view illustrating follow-through according to the present invention.

FIG. 17 is a schematic view illustrating finish according to the present invention.

FIG. 18 is another schematic view illustrating finish according to the present invention.

FIG. 19 is a further schematic view illustrating finish according to the present invention.

FIG. 20 is a perspective view showing a second embodiment of the present invention.

FIG. 20A is a perspective view showing a vertical pillar coupled with a height-position-adjustable corrector for jointing with bars in accordance with the second embodiment of the present invention.

FIG. 21 is a side elevational view of a use of the second embodiment of the present invention, illustrating, in a schematic form, a condition of address.

FIG. 22 is a perspective view showing a third embodiment of the present invention.

FIG. 22A is an exploded view, in a schematic form, showing a correction device according to the third embodiment of the present invention.

FIG. 23 is a side elevational view of a use of the third embodiment of the present invention, illustrating, in a schematic form, a condition of address.

FIG. 24 is a schematic view illustrating correction of positions of two hands in top of swing according to the third embodiment of the present invention.

FIG. 25 is a schematic view illustrating observation and correction of positions of two hands in downswing, before contacting a ball, according to the third embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims.

Referring to FIGS. 1-3A, the present invention provides a golf swing plane correction device, which comprises a bottom board 10, a shaft seat 20, and two angle adjustment bars 30, 30 a.

The shaft seat 20 is coupled, in a resistance adjustable manner, to a top side of the bottom board 10. In the instant embodiment, the shaft seat 20 is provided on two ends thereof with support frames 21 mounted to the bottom board 10. The support frames 21 are each provided, on one side thereof, with a vertical board 23 that is formed with a shaft hole 22 to allow two ends of a central shaft 25 that comprises an elastic element 24 to fit over a middle portion thereof to extend therethrough for being supported and retained. The two ends of the central shaft 25 are each provided with a thread 26, and a nut 27 is mounted to the thread 26. As such, the two angle adjustment bars 30, 30 a are respectively coupled, through shaft jointing, to the central shaft 25 at locations between outer ends of the elastic element 24 and the vertical boards 23 of the support frames 21. The nuts 27 respectively provided on the two sides are screwed inwardly to fasten the two angle adjustment bars 30, 30 a and at the same time compress the centrally-located elastic element 24 (as shown in FIG. 3), so that reaction forces generated and determined by the degree of compression of the elastic element 24 provides an effect of adjustment of the resistance.

The two backswing and downswing plane angle adjustment bars 30, 30 a are rotatably mounted to the shaft seat 20 and are acted upon by the resistance of the shaft seat 20 to be combined to the bottom board 10 in a manner of being adjustable to and positioned at any desired angle. The bottom board 10 is provide, on the top side thereof, with a hub cover (not shown in the drawings). The two backswing and downswing angle adjustment bars 30, 30 a each have an operation end that is coupled to an extension bar 31, 31 a, wherein the bar 31 comprises two movable reference rings 40, 40 a rotatably mounted thereto and the other bar 31 a comprises a movable reference ring 40 b rotatably mounted thereto. Each of the reference rings 40, 40 a, 40 b comprises a ring body inside which a tube 41 is mounted. The tube 41 comprises a flexible sleeve 42 received and coupled therein to allow the ring body to tightly fit over and attached to the bar 31, 31 a in a manner of being slidable and positionable. Joint ends of the angle adjustment bars 30, 30 a and the bars 31, 31 a are respectively provided with threaded holes and threaded rods for combination through screwing, allowing for easy detachment and storage. The bars 31, 31 a can each be a one-piece solid bar or a multiple-section telescopic or otherwise extendable/retractable bar.

Further, the angle adjustment bars 30, 30 a of the present invention, in addition to being applied with a force by the adjustable resistance of the shaft seat 20 to adjust the angle thereof, are each provided, on a shaft-side end of the angle adjustment bar 30, 30 a in a rotatable manner, with a collar 23 having ratchet teeth 32 and a pawl 34 having an end that projects outward is provided at a location corresponding to the ratchet teeth 32 so that the pawl 34 is normally in retaining engagement with the ratchet teeth 32 to provide the angle adjustment bar 30, 30 a with an effect of one-way step-wise angle adjustment. When a user pokes the pawl 34 away from retaining engagement with the ratchet teeth 32, reverse movement for returning of the angle adjustment bars 30, 30 a can be carried out (as shown in FIG. 3A).

Referring to FIGS. 1, 4, and 5, in use of the present invention, the swing plane correction device is positioned rearward of a ball striking direction of a player 70 by a predetermined distance (as shown in FIG. 4) such that an axis of the shaft seat 20 corresponds to a corresponding point of a ball location of the golf ball 73 and the bars 31, 31 a extending from the angle adjustment bars 30, 30 a are set parallel in a direction toward the player 70 (as shown in FIG. 4). Based on the height of the player 70 and the length of the club body 71 used, the angle adjustment bars 30 to which the reference rings 40, 40 a are rotatably mounted are adjusted to standard backswing plane angle; however the backswing plane angle is set according to a reference point defined by the rear deltoid muscle of the player 70 so that the rearward bar 31 is extended to form references axes for correcting the backswing frame. The angle adjustment bars 30 a to which the reference ring 40 b is rotatably mounted is adjusted to a standard downswing plane angle; however, the downswing plane angle is set according to a reference point defined by the club body 71 so that the rearward bar 31 a forms a reference axis for correcting a downswing plane. The two reference ring 40, 40 a that are rotatably mounted to the backswing plane bar 31 are respectively adjusted to locations corresponding to the deltoid muscle of the player 70 and the positions of two hands at a top point of backswing, while the reference ring 40 b rotatably mounted to the downswing plane bar 31 a is adjusted to an end point of club grip of the player 70 (as shown in FIG. 5) so as to define an observation point for hand position of backswing of a club swing motion and an observation point for club head position of downward and impact.

Referring to FIGS. 5-9, during backswing, the player 70 turns about a turning axis defined by the spline where back brain, shoulder, and hips are located in a straight line, in combination with the sequence of upswing, the arms, torso hips being rotated and center of gravity being shifted, to allow the club head 72 to move on a correct backswing plane by following the backswing plane bar 31 (as shown in FIGS. 6-8). In case that during the backswing, the club head 72 deviates from the bar 31, a user may observes from one side the deviation of the club head 72. However, the backswing being steep is because the rotation of the shoulders is incorrect or just moved with two hands or the wrists presses down the club head during takeaway, and oppositely, being too shallow is because the wrists turn or the two hands pull the cub head 72 toward the body during takeaway. Precisely identifying the deficiency of swing and making an immediate correction can be achieved. When the hands reach the top of backswing, if the body of the player 70 can make complete turning correctly, positioning the shoulder under the chain, back facing the target, then the torso and the hips would generate the greatest muscle force therebetween through contraction due to the turning, where the greatest muscle force can be referred to as the greatest power of one operation muscle group, while the two hands correctly fall in the observation point of the reference ring 40 of the bar 31 (as shown in FIG. 9).

Referring to FIGS. 10-12, during downswing, the stretching force of the top of the backswing continues, in combination with correct turning of the hips and torso and shifting of the center of gravity, the two arms are driven to rotate and the two hands are guided to transfer the club head 72 to a downswing plane defined by the bar 31 a of the correction device (as shown in FIGS. 10, 11, and 12), and accelerated to initiate the swing force thereby achieving a powerful impact. In case that the two hands of the player 70 move down during downswing (forming an excessively steep downswing plane) or the turning of the waist is excessive (forming an excessively shallow downswing plane), the correctness of impact direction is affected and intentionally correcting of impact path would making it not possible to fully exploit the force thereby affecting the shot range. Thus, using the present invention makes it possible to identify the problem according to the situation where the club head 72 deviates from the bar 31 a (as shown in FIGS. 11 and 12) to make timely improvement so as to achieve a correct downward path to release the force of the club head 72 for impact through the impact zone (as shown in FIGS. 12-14). And, finally, complete training is done with a complete follow-through motion (as shown in FIGS. 15 and 16) and finish motion (as shown in FIGS. 17-19).

Referring to FIGS. 20, 20A, and 21, a second preferred embodiment of the present invention is provided. The present invention provides a golf swing plane correction device, which comprises a bottom board 10, a shaft seat 20, and two angle adjustment bars 30, 30 a and a vertical pillar 50.

The shaft seat 20 is coupled, in a resistance adjustable manner, to a top side of the bottom board 10. In the instant embodiment, the shaft seat 20 is provided on two ends thereof with support frames 21 mounted to the bottom board 10. The support frames 21 are each provided, on one side thereof, with a vertical board 23 that is formed with a shaft hole 22. A central shaft 25 has two ends that are respectively provided with threads is fit with, in a middle portion thereof, with an elastic element 24 such that the angle adjustment bars 30, 30 a are rotatably mounted to two sides thereof, and is received in the shaft holes 22 of the vertical boards 23 of the support frames 21 and is secured through screwing of nuts 27 provided on the outer sides of the vertical boards to forcibly compress the two angle adjustment bars 30, 30 a that are on the two sides toward the elastic element 24 that is located at the center so that reaction forces generated and determined by the degree of compression of the elastic element 24 provides an effect of adjustment of the resistance (as shown in FIGS. 2 and 3).

The two angle adjustment bars are further provided, in the side where the bars 31, 31 a extend, with a vertical pillar 50. The vertical pillar 50 is set up, in a manner of being perpendicular to the ground, at a location corresponding to the player 70. The vertical pillar 50 is coupled with a plurality of height-position-adjustable correctors 51 for respectively jointing with the bars 31, 31 a (as shown in FIG. 20A). To use, the correctors 51 are each in the form of a block and is provided, on at least one vertical surface, with a through hole 52 for receiving the vertical pillar 50 to tightly extend therethrough for slidable adjustment of height and positioning of the corrector 51 and positioning. An inclined block 53 is provided on one side of the through hole 52. The inclined block 53 is provided with a through aperture 55 having two sides expanded outward to form an elongate slot 54 for receiving extension of the bars 31, 31 a therethrough so that by setting the height of the corrector 51, the inclination angle of each of the bars 31, 31 a can be set (as shown in FIG. 20A).

To use the instant embodiment, the bars 31, 31 a are respectively received through and coupled to the through apertures 55 of the corrector 51. One of the correctors 51 is adjusted to a point corresponding to the deltoid muscle of the player 70 so that the bar 31 defines, through connection of two points of the ground and the corrector 51, a standard backswing plane angle to form a reference axis for correcting the backswing plane. The reference ring 40 that is rotatably mounted to the bar 31 is adjusted to the position corresponding to the position of hands at the top of backswing. The other bar 31 a, based on a reference of the club body 71, also defined a standard downswing plane angle through connection between two points of the ground and the corrector 51 to form a reference axis for correcting the downswing plane.

Referring to FIGS. 22-25, a third preferred embodiment of the present invention is provided. In addition to the vertical pillar 50 arranged at the side where the bars 31, 31 a extend, the instant embodiment further comprises a conversion plane bar 60, the conversion plane bar 60, which is jointed, in an angle adjustable manner through another corrector 51 a, to the vertical pillar 5 o between the two bars 31, 31 a and the reference rings 40, 40 a are respectively and rotatably mounted to two ends of the conversion plane bar 60. In the instant embodiment, the corrector 51 a is similarly provided, in one end surface thereof, with a through hole 52 a to receive the extension of the vertical pillar 50 therethrough. A bolt 56 is provided on one side surface at one side of the through hole 52 a for rotatably jointing an angle adjustable rotation block 57, and the rotation block 57 is provided with a connection hole 58 for receiving the extension of the conversion plane bar 60 (as shown in FIG. 22A).

To use the instant embodiment, similarly, the corrector 51 is used to adjust, with the deltoid muscle of the player 70 as a reference, the bar 31 to form a reference for correcting the backswing plane, and the bar 31 a is adjusted, with the club body 71 as a reference, to form a reference axis for correcting the downswing plane. The conversion plane bar 60 is adjusted, through the corrector 51 a, to the most suitable height and angle and then the reference rings 40, 40 a at the two ends of the conversion plane bar 60 are respectively adjusted to positions corresponding to the top of the backswing and the impact point of the downswing, in order to form observation points for correcting the position of hands. During backswing, the bar 31 can be used to correct the club head 72 for moving along a correct backswing plane path. When the top of backswing is reached, the reference ring 40 of the conversion plane bar 60 can be used to observed if the hands of the player 70 are located at the observation point of the reference ring 40 (as shown in FIG. 24). During downswing, similarly, the bar 31 a can be used to correct the club head 72 to move along a correct downswing plane path. When the downswing process reaches the time point of immediately before impact of ball, the reference ring 40 a of the conversion plane bar 60 can be used to observe the position of the hands of the player 70 before impact of ball during the downswing (as shown in FIG. 25), so that the hands could be at the correct position to release the force of the club head 72 for impact of the ball in the impact zone. Finally, follow-through and finish motions follow to complete the training of correct swing posture.

It can be known from the above that the golf swing plane correction device of the present invention provides the following advantages:

(1) The correction device may, according to body height and club length, be adjusted to convert an abstract swing plane into a tangible form for effectively identifying the deficiency of swing posture and for timely correction to thereby improve learning performance and enhance skills.

(2) With such a tangle formed of swing plane, it is possible to guide correct use of the core muscle group of the sequence of use of the muscle group to enhance coordination among muscle groups and to timely use correct muscles to improve flexibility and enhance muscle power.

(3) It is possible to achieve excellent swing rhythm, stabilized relative balance of swing, improve swing performance and increase explosiveness.

(4) It is possible to achieve consistency and collaboration of swing motion, making swing trace more stable, faster, and smoother, to create an increased speed of the club head for effectively increasing shot range and accuracy of direction.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention. 

I claim:
 1. A golf swing plane correction device, comprising a bottom board, a shaft seat, and the two angle adjustment bars; wherein the shaft seat is mounted to a top side of the bottom board and the two angle adjustment bars are respectively coupled, through shaft-jointing, to a central shaft of the shaft seat, the two angle adjustment bars being rotatably coupled to the shaft seat in a manner of allowing an angle thereof to be adjusted to a desired value and positioned at the desired angle through resistance provided on the shaft seat, each adjustment bar having an operation end to which an extension bar is connected; and the shaft seat is provided, on two ends thereof, with support frames for mounting to the bottom board, wherein the support frames being each provided, at one side thereof, with a vertical board that is formed with a shaft hole, and a central shaft having two ends provided with threads and receiving an elastic element to fit over a middle portion thereof, with two sides thereof being respectively and rotatably coupled with the angle adjustment bars, and being received through the shaft holes of the vertical boards of the support frames, nuts being provided at outer sides of the vertical boards and screwed to forcibly compress the angle adjustment bars that are located at two sides toward and pressing the elastic element that is located at the center so that a reaction force generated and determined by a degree of compression of the elastic element provides an effect of adjustment of resistance.
 2. The golf swing plane correction device according to claim 1, wherein the angle adjustment bars are each provided, at one end thereof at a pivotal joint side, with a collar having ratchet teeth, a pawl projecting outward and provided at a suitable location corresponding to the ratchet teeth so that the angle adjustment bars each provide an effect of one-way step-wise angle adjustment.
 3. The golf swing plane correction device according to claim 1, wherein for the bars connected to and extending from the operation ends of the two angle adjustment bars, one of the bars being provided with two movable reference rings, and the other one of the bars being provided with a movable reference ring.
 4. A golf swing plane correction device, comprising a bottom board, a shaft seat, the two angle adjustment bars, and a vertical pillar; wherein the shaft seat is mounted to a top side of the bottom board and the two angle adjustment bars are respectively coupled, through shaft-jointing, to a central shaft of the shaft seat, the two angle adjustment bars being rotatably coupled to the shaft seat in a manner of allowing an angle thereof to be adjusted to a desired value and positioned at the desired angle through resistance provided on the shaft seat, each adjustment bar having an operation end to which an extension bar is connected; and the vertical pillar is mounted at one side where the bars of the two angle adjustment bars extend, correctors being coupled to the vertical pillar and being adjustable for height positions thereof for respectively jointing with the bars extending from the angle adjustment bars.
 5. The golf swing plane correction device according to claim 4, wherein the shaft seat is provided, on two ends thereof, with support frames for mounting to the bottom board, wherein the support frames being each provided, at one side thereof, with a vertical board that is formed with a shaft hole, and a central shaft having two ends provided with threads and receiving an elastic element to fit over a middle portion thereof, with two sides thereof being respectively and rotatably coupled with the angle adjustment bars, and being received through the shaft holes of the vertical boards of the support frames, nuts being provided at outer sides of the vertical boards and screwed to forcibly compress the angle adjustment bars that are located at two sides toward and pressing the elastic element that is located at the center so that a reaction force generated and determined by a degree of compression of the elastic element provides an effect of adjustment of resistance.
 6. The golf swing plane correction device according to claim 4, wherein the correctors are each provided, in at least one vertical surface, with a through hole for receiving extension of the vertical pillar therethrough, an inclined block being provided at one side of the through hole, the inclined block being provided with a through aperture having two sides outward expanded to form an elongate slot for receiving extension of the bars extending from the angle adjustment bars therethrough.
 7. The golf swing plane correction device according to claim 4 further comprising a conversion plane bar, the conversion plane bar being coupled through an additional corrector, in a an adjustable manner, to the vertical pillar between the two bars (31, 31 a), two reference rings (40, 40 a) being respectively and rotatably mounted to two ends of the conversion plane bar, one of the correctors being provided, in an end face, with a through hole for receiving extension of the vertical pillar therethrough, a rotation block being provided, in a rotatable manner, to a side surface at one side of the through hole, the rotation block being provided with a connection hole for receiving extension of the conversion plane bar therethrough.
 8. The golf swing plane correction device according to claim 4, wherein the correctors are each provided, in at least one vertical surface, with a through hole for receiving extension of the vertical pillar therethrough, an inclined block being provided at one side of the through hole, the inclined block being provided with a through aperture having two sides outward expanded to form an elongate slot for receiving extension of the bars extending from the angle adjustment bars therethrough.
 9. The golf swing plane correction device according to claim 4, wherein for the bars connected to and extending from the operation ends of the two angle adjustment bars, one of the bars being provided with two movable reference rings, and the other one of the bars being provided with a movable reference ring. 